I have come to the conclustion that Sky have a significant problems with their Sky+ software. I had my Sky + V2 box replaced in October due to problems with input 2 breaking up my recordings and generally arsing up my system. I also had problems with % free then. Now, I have had the new box since about 10 October and already I have % free problems AGAIN, having only used it for two months. I cleared down the planner in order to upgrade the box last night and with no programming I only had 76% free! Anyway warranty has expired now so I've upgraded the disk this evening. Let's see what happens.